Предмет: Математика, автор: Pavelruh12

На болоте на должность дирижера лягушачьего оркестра претендовало четыре кандидата А, Б, В и Г. По правилам выбора голосование осуществлялось кваканьем в поддержку выбранного кандидата, причем промолчать (набрав воды в рот) нужно было ровно три раза. Квакомер показал, что за А было отдано 0,225 всех голосов, за Б - % всех голосов, голоса отданные за В и Г разделились в отношении . Сколько лягушачьих голосов собрал каждый дирижер, если за Б проквакало на 40 лягушек больше, чем за А?

Ответы

Автор ответа: SwWasti
0
х-всего голосов
за А проголосовало 0,225х=225х/1000=9х/40
за Б- 26 2/3  :100*х=80/(3*100) *х=8/(3*10) *х=4/(3*5) х=4х/15

4х/15-9/40х=40
32х/120-27х/120=40
5х/120=40
5х=120*40
5х=4800
х=4800/5=960 
960*0,225=216 голосов за А
960*4/15=256 голосов за Б
960-(216+256)=488- голосов за В+Г

2,4=2 4/10=2 2/5=12/5
1 2/3=5/3
12/5у+5/3у=488
36/15у+25/15у=488
61у/15=488
61у=488*15
61у=7320
у=7320/61=120
12/5*120=288
- голосов за В
488-288=200- голосов за Г
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